کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1267041 | 1496826 | 2016 | 6 صفحه PDF | دانلود رایگان |
• The key feature of the concept is to introduce double blue mixed-host EMLs with an orange ultrathin layer.
• The white device without spacer or interlayer achieves superior color-stability.
• The peak efficiencies of 40.8 lm/W and low turn-on voltage of 2.71 V are realized.
• The double mixed-host EMLs concept proves to be quite useful in achieving excellent device performance.
We demonstrate high-efficiency and superior color-stability white phosphorescent organic light-emitting diodes based on double blue mixed-host emission layers (EMLs) with different mixed ratios. The key feature of the concept is to introduce double blue mixed-host EMLs with an orange ultrathin layer sandwiched between them. The improved white device without spacer or interlayer achieves superior color-stability and reduced efficiency roll-off, which are consistent with the good ambipolar conductivity of the mixed-host layer. Moreover, peak efficiency of 40.8 lm/W and low turn-on voltage of 2.71 V are realized. The double mixed-host EMLs concept proves to be quite useful in achieving excellent device performance.
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Journal: Organic Electronics - Volume 31, April 2016, Pages 136–141